Answer:
The indigenous communities in the Philippines are Blaan, Higaonon, Bukidnon, Mamanwa, Manobo, Mandaya, and Mansaka etcetera.
The greatest role of the indigenous communities to the Philippines is that they support the conservation of biodiversity through their traditional or cultural innovations, knowledge, and practices that were very close to nature.
The indigenous people were self-sufficient communities and uphold their traditions reflecting in their practices such as agriculture, music, dance, and rituals.
Hence, the greatest role of the indigenous communities to the Philippines was their natural practices that support the conservation of biodiversity and uphold the tradition.